My long time friend Randy had not yet heard the R500 (R40 many times), so after chores (moved & spread 20T rock), we took it outside w/both 410s for a demo. He couldn't believe how good it sounded and how loud it was (I still haven't taken the "master" past noon), and I'm more impressed every time I hear it. We tried many extreme EQ settings on both R500 and the Pbass special - incredible range of frequency/tone control. To my ear, the Pbass "Mid" knob gets the "crown" as the single most "influential". Set-up/take down is quick and easy. Really liking these Rumbles! 
TB caused GAS again (SCR-DI is on the way), so appreciate the Effects/Amp info - hadn't yet tried it.
Cheers,
TB caused GAS again (SCR-DI is on the way), so appreciate the Effects/Amp info - hadn't yet tried it.
Cheers,